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Significant Accounting Policies - Estimated Useful Lives of Assets and Considering Residual Value (Detail) | 12 Months Ended
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Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [line items] |
Residual Value | 15.00%
Airframe and engines [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful life (years) | 27 years
Residual Value | 15.00%
Major maintenance events [member] | Bottom of range [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful life (years) | 3 years
Major maintenance events [member] | Top of range [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful life (years) | 16 years
Ground equipment [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful life (years) | 10 years
Furniture, fixture, equipment and other [member] | Bottom of range [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful life (years) | 5 years
Furniture, fixture, equipment and other [member] | Top of range [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful life (years) | 10 years
Leasehold improvements [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Estimated useful lives | Lesser of remaining lease term and estimated useful life of the leasehold improvement

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- Definition An estimate of the average number of years an asset is considered usable before its value is fully depreciated. + References No definition available. + Details
Name: | cpa_EstimatedUsefulLivesOfTangibleAsset
Namespace Prefix: | cpa_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Property plant and equipment estimated useful lifes. + References No definition available. + Details
Name: | cpa_PropertyPlantAndEquipmentEstimatedUsefulLifes
Namespace Prefix: | cpa_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Salvage value assets rate. + References No definition available. + Details
Name: | cpa_SalvageValueAssetsRate
Namespace Prefix: | cpa_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=cpa_AirframeAndEnginesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=cpa_MajorMaintenanceEventsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=cpa_GroundEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=cpa_FurnitureFixturesAndOtherEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_LeaseholdImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |